Home / 28,891.20-39,881.34-18,133.20

Finding the Fourth Proportional to 28,891.20, 39,881.34 and 18,133.20

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Solution

The fourth proportional to 28,891.20, 39,881.34 and 18,133.20 is: 25,031.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,891.20 : 39,881.34 = 18,133.20 : x
  2. Step 2: Convert to fraction form
    28,891.20/39,881.34 = 18,133.20/x
  3. Step 3: Cross multiply
    28,891.20x = 39,881.34 × 18,133.20
  4. Step 4: Simplify right side
    28,891.20x = 723,176,314.49
  5. Step 5: Solve for x
    x = 723,176,314.49/28,891.20
  6. Step 6: Final answer
    x = 25,031.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.